Two equations to solve for a variable.

Two equations to solve for a variable.

Mickey has eaten 5 pieces of cheese each day this year. Minnie has eaten 3 pieces of cheese each day this year, but also ate 12 pieces last year.

please help me and show the steps for the solution

5a-10b+15=0 -2a+4b=6

In a two digit number. The units digit is thrice the tens digit. If 36 is added to the number, the digits interchange their place. Find the number.

Need.help asap plz thnx

One canned juice drink is 25% orange juice; another is 5% orange juice. How many liters of each should be mixed together in order to get 20L that is 20% orange juice

Which constants can be multiplied by the equations so one variable will be eliminated when the systems are added together? 5x + 13y = 232 12x + 7y = 218

how many cones and sundaes were sold? solve the equations by using the substitution method.

Find the measures of two complementary angles if one angle is four times the other angle

Write a system of equations that can be solved using substitution

adult tickets to play cost $22. TIckets for children cost $15. TIckets for a group of 11 people cost a total of $228. Write and solve a system of equations to find how many children and how many adults...

You are looking for an after-school job. One pays $9 per hour. Another pays $12 per hour, but you must buy a uniform that costs $39. After how many hours of work would your net earnings from either...

How do I solve y=-5x+7 and y=8x+7 to get the answer in (x, y) form?

It's solving systems by substitution

The first number times the second number equals 30. what is the equation

I don't understand how to solve this problem.

im not really sure how to do this question. please help me with this? ...

im a junior in high school and need help to do these problems or i just didnt understand him but im solving by substitution and i really need some one to please help me ...

The length of a rectangle is 3 more than it's width. The perimeter of the rectangle is 58cm. What are the rectangle's dimensions?